Know all about Hyaloclastite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Hyaloclastite and Tachylite belong to Igneous Rocks.Texture of Hyaloclastite is Pyroclastic whereas that of Tachylite is Vitreous. Hyaloclastite appears Dull and Tachylite appears Glassy. The luster of Hyaloclastite is dull and grainy while that of Tachylite is resinous. Hyaloclastite is available in brown, grey, yellow colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Hyaloclastite and Tachylite are cemetery markers, creating artwork.